1438994880 has 168 divisors, whose sum is σ = 5031297024. Its totient is φ = 377395200.

The previous prime is 1438994873. The next prime is 1438994881. The reversal of 1438994880 is 884998341.

1438994880 is a `hidden beast` number, since 1 + 438 + 99 + 48 + 80 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438994881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 171585 + ... + 179775.

Almost surely, 2^1438994880 is an apocalyptic number.

1438994880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1438994880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2515648512).

1438994880 is an abundant number, since it is smaller than the sum of its proper divisors (3592302144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1438994880 is a wasteful number, since it uses less digits than its factorization.

1438994880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8275 (or 8262 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

The square root of 1438994880 is about 37934.0859913614. The cubic root of 1438994880 is about 1128.9804362441.

The spelling of 1438994880 in words is "one billion, four hundred thirty-eight million, nine hundred ninety-four thousand, eight hundred eighty".